Publications
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A field guide to valuable underwater aquatic plants of the Great Lakes A field guide to valuable underwater aquatic plants of the Great Lakes
Underwater plants are a valuable part of the Great Lakes ecosystem, providing food and shelter for aquatic animals. Aquatic plants also help stabilize sediments, thereby reducing shoreline erosion. Annual fall die-offs of underwater plants provide food and shelter for overwintering small aquatic animals such as insects, snails, and freshwater shrimp. In some areas, underwater plants may...
Authors
Donald W. Schloesser
Dynamics of alewives in Lake Ontario following a mass mortality Dynamics of alewives in Lake Ontario following a mass mortality
The U.S. Fish and Wildlife Service and the New York Department of Environmental Conservation assessed the population of alewives Alosa pseudoharengus in U.S. waters of Lake Ontario during 1976–1982 with bottom trawls. Alewives were abundant in 1976 but a die-off greatly reduced their numbers during the winter of 1976–1977. The population quickly recovered, however, adult abundance...
Authors
Robert O’Gorman, Clifford P. Schneider
Evaluation of hatchery-reared lake trout for reestablishment of populations in the Apostle Islands Region of Lake Superior, 1960-84 Evaluation of hatchery-reared lake trout for reestablishment of populations in the Apostle Islands Region of Lake Superior, 1960-84
No abstract available.
Authors
Charles C. Krueger, Bruce L. Swanson, James H. Selgeby
Changes in growth and maturity of walleyes associated with stock rehabilitation in western Lake Erie, 1964-1983 Changes in growth and maturity of walleyes associated with stock rehabilitation in western Lake Erie, 1964-1983
The precipitous decline in abundance of walleyes (Stizostedion vitreum vitreum) in western Lake Erie during the 1960s caused major concerns for the future of this resource. Mercury contamination in walleyes in 1970 resulted in a moratorium on commercial fishing in United States and Canadian waters. The opportunity arose for resource agencies to develop a plan for rehabilitation of the...
Authors
Kenneth M. Muth, David R. Wolfert
Depth distribution, diet, and overwinter growth of lake trout (Salvelinus namaycush) in southeastern Lake Michigan sampled in December 1981 and March 1982 Depth distribution, diet, and overwinter growth of lake trout (Salvelinus namaycush) in southeastern Lake Michigan sampled in December 1981 and March 1982
Lake trout were collected in graded-mesh gill nets and forage fishes were collected in trawls in mid December 1981 and late March 1982. The length ranges of 317 lake trout caught in December and 138 in March were 280–767 and 286–857 mm, and the age ranges I–XI and II–XIV, respectively. Three year classes (1977–79) made up almost 80% of the catches of lake trout in both sampling periods...
Authors
Gary W. Eck, LaRue Wells
Predictive models in hazard assessment of Great Lakes contaminants for fish Predictive models in hazard assessment of Great Lakes contaminants for fish
A hazard assessment scheme was developed and applied to predict potential harm to aquatic biota of nearly 500 organic compounds detected by gas chromatography/mass spectrometry (GC/MS) in Great Lakes fish. The frequency of occurrence and estimated concentrations of compounds found in lake trout (Salvelinus namaycush) and walleyes (Stizostedion vitreum vitreum) were compared with...
Authors
Dora R. May Passino
Bioaccumulation of PCBs and mercury from Toronto and Toledo Harbor sediments Bioaccumulation of PCBs and mercury from Toronto and Toledo Harbor sediments
No abstract available.
Authors
Michael J. Mac, W. A. Willford
Toxicity of toxaphene to Bosmina longirostris and Daphnia spp. (Crustacea) Toxicity of toxaphene to Bosmina longirostris and Daphnia spp. (Crustacea)
No abstract available.
Authors
Alexander J. Novak, Dora R. May Passino
Benthic community of the Savannah River below a peaking hydropower station Benthic community of the Savannah River below a peaking hydropower station
The Savannah River below Hartwell Dam, on the South Carolina-Georgia border, contains at least 206 benthic invertebrate taxa, even though this tailwater undergoes substantial daily fluctuations in water flow, temperature, and dissolved oxygen. Oligochaetes, chironomids, and amphipods dominate the community immediately below the dam. Farther downstream, larger organisms (i.e...
Authors
Patrick L. Hudson, S. Jerrine Nichols
Distribution and habitat of Nitellopsis obtusa (Characeae) in the Laurentian Great Lakes Distribution and habitat of Nitellopsis obtusa (Characeae) in the Laurentian Great Lakes
Nitellopsis obtusa, a macroalga (Characeae) native to Europe and Asia, was found in U.S. waters of the St. Clair-Detroit River system in 1983, thus extending the range of this taxon into the Laurentian Great Lakes about 850 km from the St. Lawrence River where it was first discovered in North America in 1978. Its occurrence only in water frequented by commercial shipping vessels suggests...
Authors
Donald W. Schloesser, Patrick L. Hudson, S. Jerrine Nichols
Maturity and fecundity of the white perch, Morone americana, in western Lake Erie Maturity and fecundity of the white perch, Morone americana, in western Lake Erie
Abstract has not been submitted
Authors
Michael T. Bur
The North American Benthological Society The North American Benthological Society
No abstract available.
Authors
David D. Herlong, Patrick L. Hudson